11211220222211 has 8 divisors (see below), whose sum is σ = 11872210914720. Its totient is φ = 10550396990848.

The previous prime is 11211220222207. The next prime is 11211220222229. The reversal of 11211220222211 is 11222202211211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11211220222211 - 2² = 11211220222207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211220227211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41727431 + ... + 41995248.

It is an arithmetic number, because the mean of its divisors is an integer number (1484026364340).

Almost surely, 2^{11211220222211} is an apocalyptic number.

11211220222211 is a deficient number, since it is larger than the sum of its proper divisors (660990692509).

11211220222211 is an equidigital number, since it uses as much as digits as its factorization.

11211220222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83730573.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11211220222211 its reverse (11222202211211), we get a palindrome (22433422433422).

The spelling of 11211220222211 in words is "eleven trillion, two hundred eleven billion, two hundred twenty million, two hundred twenty-two thousand, two hundred eleven".